Roll-holder for rivet spinning machines



G. A. LINLEY ROLL HOLDER FOR RIVET SPINNING MACHINES Aug. 7, 1934.

Filed Sept. 17, 1931 INVENTOR. UEURGEA L/NLEY.

' ATTORNEK.

Patented Aug. 7, 1934 UNITED STATES 1,969,568 ROLL-HOLDER FOR RIVETSPINNING HINES MAC George A. Linley, Trumbull, Conn. ApplicationSeptember 17, 1931, Serial No. 563,305

Claims.

The present invention relates to roll-holders for rivet spinningmachines, and has for an object to provide a roll-holder which willreliably support the rolls against strain and wear, and

5 which may be readily adjusted to insure a proper relation of the rollsat all times. The roll-holder is of a type in which a pair of rolls arerotatably held in a holder at a slight angle, with their concaveperipheral surfaces meeting at the bottom,

where they engage and form the rivet head, and separated at the top. Dueto wear or strain, there has been a tendency in the past for the rollsto become separated after very little use, with the result that a smallbur would be formed at the center of the rivet head, and in order toobviate this condition it is proposed in the present invention toprovide a holder in which the rollsupporting axle may be adjusted withrespect to the side arms ofthe holder to any desired extent, the sidearms adapted to be drawn into the exact proper close relation with therolls, and in which the axle is so formed as to be held againstloosening under the severe strain to which the device is put in use.

A further object is to provide a roll-holder which will automaticallylubricate the rolls so that a small amount of lubricant will be suppliedto each rivet head as it is spun down.

A still further object is to provide a roll-holder which will protectthe operator against flying chips, flakes and lubricant.

With the above and other objects in View embodiments of my invention areshown in the accompanying drawing, and these embodiments will behereinafter more fully described with reference thereto and theinvention will be finally pointed out in the claims.

In the drawing:

.Fig. 1 is a front elevation of a roll holder,

. accordingto one embodiment of the invention.

Fig. 2 is a side elevation thereof. Fig. 3 is a vertical sectional view,taken along the line 3-3 of Fig. 1. Fig. 4 is a perspective view of theguard employed.

Fig. 5 is a perspective view of the axle employed. Fig. 6 is a verticalsectional View of modified form of the invention.

Fig. 7 is a fragmentary side elevation thereof,

' the guard being removed.

Similar reference characters indicate corresponding parts throughout theseveral figures of the drawing. 7

Referring to the drawing, the roll-holder is of substantiallycylindrical shape, and is prosaid passage under compression.

own tension and the tension of the arms.

vided at its upper end with the usual hexagonal flange 10 for securingthe same to, the threaded shank of the spinning machine, an interiorlythreaded socket 11 being provided in the upper end of the holder forthis purpose. A pair of 50 downwardly extending spaced arms or jaws 12and 13 are provided between which the rolls rotate, the inner walls ofthese arm's being flat and slightly converging downwardly, so that theopening between the rolls is slightly wider at the top than at thebottom. This opening is divided at the top by a downwardly projectingfin 14, the sidesof which are taperedin' parallel relation to the innerconverging sides of the arms, and is adapted to separate the rolls atthe top, as will presently more fully appear. 1

The arm 13 is provided with a shouldere passage 15, while the'arm 12 isprovided in opposed relation with 'a' threaded passage 16, and the armsare tempered, so that they have a slight resiliency.

The rolls 17, 18 which are of the usual form, are rotatably mounted on apin or axle 19,hav-' ing a head 20 at one end, and having a threadedportion 21 at the other end, split or slotted transversely, as at 22,the pin being" tempered and the threads 21 slightly oversize withrespect to the threaded passage 16, so that it will engage The threads21 of the pin are of such length that when engaged with thethreadedpassage 21 they extend for a distance inwardly of the inner wall of thearm 13.

I The pin 19 is engaged through the shouldered passage 15 and screwedinto the threaded passage 16, and dueto the compression of the split endof the'pin under spring tension is securely held against loosening inany desired position of adjustment. The length of th'e'threads 2'0permits the pin to be tightened to' any'desired extent to draw the arms12 and 13 toward each other to maintain a tight relation of the rolls attheir point of contact, the pin being held against loosening in thisrelationboth by'its In the usual type of roll-holder the pin isshouldered adjacent the screw threads, this shoulder abutting the innerwall of the arm into which the pin is screwed, so that when it istightly screwed into place the relation of the arms is 05 fixedand noadjustment for wear is possible, According to my invention the pin maybe tightened to any desired extent, so that regardless ofv wear therolls may be maintained in their proper .relation and their period ofuse is extended. The formation of burs on the rivet heads due toseparation of the rolls is obviated.

In the upper portion of the holder there is provided a drilled hole 23which extends downwardly from the threaded socket ll to a point withinthe fin 14 below the peripheries of the rolls, and within this holethere is provided a lubricating wick 24 pressed downwardly into contactwith the roll surfaces by a spring 25 disposed in the hole between theupper end of the wick and a retaining closure plate 26, which may besnapped into place and held by the threads. Oil or grease is supplied tothe wick through a radial duct 27 in the holder, the" outer end of whichis adapted to be normally closed by one side of the guard member,presently to be described. As the rolls revolve in opposite directions afilm of oil or grease will -b'e (':onstantlysupplied to their surfacesby the wick and this will be transmitted to the rivet head. 'The'rotation of the rolls in opposite directions will tend to turn thewick'about a vertical 'axis, so that it will not become unevenlyworn.

The guard member is of U-shape, its side portions 28 and 29, which areadapted to conform to the side of the holder, being connected at thebottom by transverse portions 30 and 31. Due to the springiness of themetal of which the guard is preferably formed the side portions 28 and29 may be sprung outwardly and when engaged with the holder'will clingto it under tension. The lower end of the guard has an opening32 throughwhich therolls project, and at each side is bulged out, as at 33 and3i,to provide clearance at the sides for the rolls. The guard isretained in place upon the holder by spring lugs 35 and 36 at its upperedge, which snap into recesses 37 and 38 formed in the sides of theholder, and which permit the guard to be readily removed and replacedwhen desired. It will be observed that the guardforms a closure for theoil duct 27. In operation the guard prevents oil from flying .on theoperator, and. also confines any chips or flakes which may be 1 carriedfrom the rivet head uponthe roll surfaces, so that the danger of beinghit in. the eye by such particles is obviated. q

, In Figs. 6 and '7 I have illustrated a modificationin which thedrilled hole 23- is of larger diameter than in the first form anddoesnot extend into the fin, and a narrower slot 39 is provided in the fin,preferably by drilling, and forms a bearing in which theshaft 40 of apair of lubricating rollers 41 and .42 is engaged for vertical .slidingmovement. The rollers which aredisposed at each side of the fin beneaththe wick'24 have slightly rounded peripheries and ride on the surfacesof the rolls 1? and 18, being freely rotatable upon the shaft 40, sothat they rotate in opposite directions during rotation of the rolls 1'?and 18 andcarry lubricant fro the wick to the surfaces of said rolls. Inthe modification illustrated in Figs. (Sand '1 I have also shownamodified form 'of*roll supporting pin '19,'which it will be understoodmay also be employed in the first embodiment, if desired. In the splitend of the pina tapered threaded hole 43 is 'drilled and is engaged by atapered set'screw 44, which is adapted to be screwed into the pin afterit is'adjusted to "expand and bind the threaded end of the pin againstmovement, this taperedset screw being withdrawn when it is desired 'toturn the pin.

v I have illustrated and described preferred and satisfactoryembodimentsof my invention but "it tween said arms, the upper portion ofsaid holder having a vertical passage therein and a duct extending fromsaid passage to the exterior surface of said holder, lubricating meansdisposed in said passage and engaging the surface of said rolls, and aremovable guard disposed about said spaced arms and forming a lateralclosure for said rolls and also forming a closure for said duct.

2. In a roll-holder for rivet spinning machines, aholder body having apair of spaced arms having aligned pin receiving passages, one of saidpassages being threaded, a pin extending through the other of saidpassages and screwed into said threaded passage, said 'pin having asplit in its threaded end and adapted to expand against said threadedpassage to bind the-pin against turning,

rolls carried upon said pin between said. arms,

and a guard disposed about said spaced arms forming a lateral closurefor said rolls and having open portions exposing theends of said pin. 3.In a roll holder for rivet spinning machines, a holder body comprisingan upper head por tion and a pair of downwardly extending arms havingupwardly diverging opposed walls, a roll carrying pin extending betweensaid arms, a pair of 'apertured rolls disposed upon said pin betweensaid walls and having bearing contact therewith, and having bearingcontact with each other at the rivet spinning pointoutwardly of saidarms, a separating fin extending downwardly from said headportion anddisposed in the central vertical plane between said. rolls adapted tomaintain them in diverging relation parallel to said diverging walls,said head portion and said fin having a common central passage ofgreater width than the thickness of said in said passage and slot andengaging the su-r-- faces ofsaid rolls at each side of said fin. '4. Ina roll holder for rivet spinning machines, a holder body comprising anupper head portion and a pair of downwardly extending arms havingupwardly-diverging opposed walls, a roll carrying pin extending betweensaid arms, a pair of apertured rolls disposed upon said pin between saidwalls and having bearing contact therewith, and having bearing contactwith each other at the rivet spinning point outwardly of'said arms,

aseparating fin extending downwardly from said head portion and disposedin the centralyertical plane between said rolls adapted to maintain themin diverging relation parallel to said diverging walls, said headportion and said fin having a common central passage of greater widththan the thickness of said fin extending downwardly through said headportion and-into said separating fin and forming a slot in said fin, anda lubricating'wick disposed in said passage and slot and engaging thesurfaces of said rolls at each side of said fin, the walls of said slotabutting said wick at opposed sides in the central vertical planebetween said rolls to hold said wick against head portion and disposedin the central vertical plane between said rolls adapted to maintainthem in diverging relation parallel to said diverging walls, said headportion having a lubricant passage of greater width than the thicknessof said fin extending downwardly therein, and lubricating rollersmounted at each side of said fin and engaging the surfaces of saidrolls, and having their peripheries in relation to said passages toreceive lubricant therefrom.

GEORGE A. LINLEY.

